Njengamanje, amalensi oxhumana nabo abancane angasetshenziswa cishe noma yiluphi uhlobo lwezinto ezingavamile zombono wokukhishwa futhi, uma kungekho ukuphikisana, kukhona okunye okulula, okunethezeka kwezibuko. Ngisho nokuphulwa okunzima okunjengokuthi i-astigmatism, eyayingenakulungiswa ukulungiswa kuphela ngezibuko kanye nama-lens aqinile, okubangela ukuphazamiseka okuningi, manje ingalungiswa ngosizo lwabo. Ukulungisa i-astigmatism, kuboniswa ama-lens othintana nabo abathandekayo, futhi lokhu kusebenza njengama-astigmatism ephezulu. Ake sicabangele ngokuningiliziwe ukuthi yiziphi i-torsi lens, yiziphi izici zama-lens ezinokukhethwa nokugqoka.
Kuyini okusho ukuthi "i-toric contact lens" kusho?
Amalensi e-Toric ngamalensi womklamo okhethekile, okungafani nama-lens ajwayelekile ajwayelekile, abonakala ngobukhulu obukhulu kanye nesimo spherocylindrical, i. ngesikhathi esifanayo babe namandla amabili optical. Lokhu kuyadingeka ukuze ulungise i-astigmatism ngosizo lwe-value elilodwa nge-meridian edingekile, futhi ngosizo lwenye inzuzo ukulungisa ukuhamba okuhambisana nokukhubazeka-ukuxhunywa komzimba noma ukusondela kweso .
I-Astigmatism iyiphutha elibonakalayo, lapho amandla okukhanya kweso ayifani nakwezingxenye ezihlukene, isb. Ngelinye iso, izinhlobo ezahlukene zokuqhaqha noma amazinga ahlukene ohlobo olufanayo lokuqhafaza zihlangene. I-pathology ezimweni eziningi ihlotshaniswa nesimo esingavamile (ukungalingani, esingenasibindi) se-cornea noma i-lens, lapho sidlula lapho imilayezo yokukhanya iphikisana ngezindlela ezahlukene. Esigulini, lokhu kuboniswa ukungakwazi ukugxilisa isithombe, esibonakala singenangqondo, esibuhlungu, kanye nezimpawu ezifana nezinsizwa, izinhlungu zeso .
Ukuze isenzo se-cylindrical se-toric lens sidluliselwe esigabeni esinqunyiwe se-cornea, lelo lensi kufanele libe nesimo esicacisiwe. Ngakho-ke, ngaphezu kwezici ezibalwe ngenhla, ama-lens okulungisa i-astigmatism inendlela yokulungisa ekhethekile ukuze bahlale endaweni ezinzile, engathinteki ngokuchofoza amajwabu amehlo, ukuhamba kwamehlo nekhanda. Ukulungiswa kungafinyelelwa ngezindlela ezihlukahlukene, phakathi kwazo ukuqina kwamalensi engxenyeni yawo engezansi, i-truncation emaphethelweni aphansi ama-lens,
Ukukhethwa kwama-toric lenses
I-toric lens ayikwazi ukuthengwa nje ngokuxhumana no-optics salon. Ngenxa yalokhu, kubalulekile ukubonisana nodokotela we-ophthalmologist bese uhlola ucwaningo oluhlanganisa ophthalmometry, refractometry nezinye izindlela. Ngaphezu kwalokho, iminyaka yesiguli, uhlobo lwemisebenzi yakhe lucatshangelwa. Ekuqaleni, i-lens ekhethiwe yokuhlolwa ivivinywa, lapho isiguli kufanele ihambe nayo cishe isigamu sehora. Uma yonke imingcele edingekayo ihlangene, ke ngokusho kwezici ezikhethiwe, amalensi ngamunye akhiwa. Ngaphandle kwalokho, ukukhethwa kwamalensi kuqhutshwa.
Uma ugqoke i-toric lens, kufanele ukhumbule ukuthi kusukela banomkhulu obukhulu kunokujwayelekile, ngaphandle kwaleso sikhathi bangasetshenziswa isikhathi eside, bese besongela izinkinga ze-hypoxic (ukungabi khona kwe-oksijini okuhlinzekwa kwezicubu zeso). Kubalulekile ukugcina imvamisa yokufaka esikhundleni, lokho
Futhi, umuntu akufanele akhohlwe ukuthi i-toric lens enesikhathi eside egqoke idinga ukunakekelwa kwansuku zonke ngezixazululo zendabuko eziningi.
Abakhiqizi abahamba phambili be-lens contact lens kukhona izinkampani ezinjalo:
- Johnson & Johnson;
- I-Bausch & Lomb;
- Wohlk-Contact-Linsen et al.